KGF-1 vs Matrixyl

Binds FGFR2b (the KGF receptor), which is exclusively expressed on epithelial cells — providing tissue-specific action without mesenchymal effects. Activates RAS/MAPK and PI3K/Akt to promote keratinocyte proliferation and migration. Extends the anagen phase of the hair growth cycle.

A member of the fibroblast growth factor family that specifically and exclusively targets epithelial cells via FGFR2b. A potent stimulator of keratinocyte proliferation with applications in wound healing, hair follicle growth, and mucosal repair.

Palmitoylated pentapeptide fragment of collagen I; binds TGF-β receptors on fibroblasts; upregulates collagen I, III, and fibronectin; procollagen production via MAPK pathway

The original and most clinically validated cosmeceutical peptide. A fatty acid-conjugated collagen fragment that directly stimulates fibroblasts to produce new collagen. Validated in multiple clinical trials.